The seed is the foundation of the grow. Naturally this means you want the highest quality you can get, not a hemp hybrid. Even if you have it, and it was free, its not a good start quality-wise. Plus they are not good for beginners because they trigger flowering by age. Any innocent beginner mistake can affect quality and quantify of the final harvest because the plant is out of your control, you arent deciding the right time for flowering, and it doesn't have time to bounce back from any mistake, resulting in disappointing results for your work and investment. Autoflowering hemp hybrids are unstable and have variation between siblings. It may not even be anything like it was described or named. Its a genetic lottery, that also contains runts. Most people notice the auto hemp effects wear off faster, lack potency, and have a limited terpene quality and content compared to regular, photoperiod drug plants. Ruderalis hemp has its uses, mostly as a salad topping like europeans discovered as their best use, where up to recently was a normal salad topping. So its wiser, more assuringly a better outcome to get better starting gear. Next is the soil. Then light, fans, all that is important but quality and success starts at the seed. As for your light, 100 watts or less in my amateur opinion. Most can be adjusted in increments. Get slightly more than you need, dim it a little for the first go. The space is tiny, which complicates your situation. Consider making a overall better plan, with more space if possible.